Automatic changeable sign.



' No. 833,985. TATENTED 00123, 1906. T. W. THOMAS & G. W. GILLBTTE.

AUTOMATIC GHANGEABLB SIGN.

APPLICATION FILED NOV'= 23. 1905.

' 4 SHEETS-SHEET 1. @yl

m i I ,I Hilf -WvnulummwwAMJft ----,Ilfs A i.- um? L .7. W /v No.833,985. PATENTBDOGT. 23, 1'906,

T. W. THOMAS @L G. W. GILLETTE,

AUTOMATIC GH'ANGEABLE SIGN.

APPLICATION FILED NOV. 23. l1905.

4 SHEETS-SHEET 2.

' ANo. 833.985.

, 'PATENTED OCT. 23, 1906. T. W. THOMAS & G. W. G'ILLBTTE. AUTOMATICGHANGEABLE SIGN.

APPLICATION FILED Nov. 23. 1905.

- 1V SHEETS-SHEET 3,'

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Nofaass. 'l PATENTED OJT'. 23,1906.

T. W. THOMAS & G. W.` GI-LLETTE.

AUTOMATIC GHANGEABLI; SIGN. APPLICATION FILED Nov. 2s, 1905.

4 SHEETS-SHEET 4.

. invented certainI new and usefulrlmprove- 1 UNTED .STATESIFRArEni?OEELOE."v

THOMAS w.` THOMAS"y AND GEORGE W. GILLETTE, OE CLEVELAND, OHIO,ASsiGNOEsOE ONE- HALE To SHEELDAN RISLEY, OE CLEVELAND, l

OHIO,

No. 833,922.5.,v

.specification of Letters Patent.-k 1

'AUTOMATIC CHANGE/ABLE SIGN.

Patented Oct. 23, 1906.

" To dll whom it may concern:

, Be it known that we,-'THoMAs W. THOMAS andiGEORGE W. GILLETTE,citizens of ,the UnitedStates, residing at Cleveland, in the county ,ofCuyahoga and `State of Ohio, have ments in Automatic Changeable Signs,of which the following is a specification.

'i invention yin lgeneral irelates. to, im-A provements mtravelmgadvertising-signs 1n which the signs continuously and automaticallychange, and more especiallyjrelates to and is an improvement andsimplification of ourinvention of a similar deviceas disclosed in ourapplication, filed May 18, 1905, Serial No. 260,969. Y -,f.

`The object of our invention is to'provide a device having an .unlimitednumber `of, display `sections or signs and means for suspendl zo' mgthese 'sections 'ina conveniently small s ace and for allowing'them tobe carried int'o isplay position and to provide an operatingmechanismin* conjunction therewith ,to cause said display sections orsigns automatically to travel into` and stop in display-positionconsecutively.'` We accomplish this with the novel arrangement andconstruction of,

parts hereinafterdescribed, illustrated in the accompanying drawings,and pointed out in theclaims appended hereto. l v In the accompanyingdrawings, Figurel is a/ront elevation with a portion of the front brokenaway, showing the sign-carrier, the

artition-bars, -and the operating mechanism underneath, Figj2 is a planview of the operating mechanism, .the top of the machine .heing removedalong .the .line A'B, Fig.I l1,

showing the motor, magnetic clutch, magnetic brake, and theelectricswitches or controllers.

Fig...3 is la side elevation showing the generaly arrangementofthesign-carrier and the operating mechanism indriving connectiontherewith. 'Fig. 4 isa detail.sectionalfelevation along the line ,C D,Fig. 2, showin the automatic switch .for the magnetic bra e. Fig. V5 isadetail sectional elevation along the line E F, Fig. 2, showing thelautomatic switch o erated by the combined movements. of t e brake andmain shaft for opening and closing the magnetic-brake-coil circuit.vFig. 6 is a detail sectional elevation along they line G H,-

Fig. 2, showing the magnetic-brake mechanism. Fig-.7"is' a' detail.sectional elevation along the line J, Fig. 2, showing the supplementaryswitch for regulating the action .of

the magnetic brake. Fig,` 8. is 'a diagrammatic ous parts in operation.f

. Similar ii ures referl to similar parts throughout t` e various views.As we have constructed-our invention the framework consists of foursimilar upright angle-bars 1, four similar horizontal bars, 2, and `foursimilar horizontal-bars 3, fastened vview showing the wiring connectingthevari- .togethenas shown, to form a rectangular frame. Secured to thebottom of the frame is the wooden platform or hase 4, and at each side,connecting .the upright. angle-bars 1 1,

are secured pairs of horizontal cross-bars 5, W

6, 7, and `8. The shaft 9 extends through and turns in suitable bearingsin the horizontal bars 7 7 and carries, secured to and turnvin with it,the pair of sprockets 10' 10'Outsi e the frame and a pair of sprockets11 11 on each side within the frame. The sprocket 12, Fig. 3, turns onthe lstud 13,`secured to the horizontal bar 5, as shown, the inner end"of said stud being countersunk vinto said sprocket, Aanda similar srocket is similarly secured on the opposite si e of the frame. To

theA cross-bars 14, extending between the horizontals 3 and 5, aresecured the studs 15,'v v

von which turn the sprockets 16, the lends of said studs beingcountersunk into said sprockets. Similar sprockets are similarly securedto correspond thereto on the opposite side'of' the frame.

To the horizontal cross-bar are secured the studs 17 17;, on which turnthe sprockets 18 18, the ends of the studs `being counter- 'sunk intothe sprockets, and similar sprockets are similarly secured. tocorrespond thereto 'on the opposite side ofthe frame.

[chains to travel over the various pairs of A, sprockets 1n unison.

, A series of display sections or signs 22 are sus ended between theendless chains 21 21 in t e following manner: At 'equal intervals insaid chains, the intervals depending on and equaling the height of thedisplay sections or The 4 s rocket 20 turns on the stud 19, secured toIOO 3o' the sprockets.

llO

Itravel with the chains around t e sprockets without binding and withminimum friction.

The display sections or signs may be made of any su1table material andmay be'cither transparent or opaque. If-trans arent, they can beilluminated Whenin disp ay position by a reflector-box 25, containjn thelamps 27, which box is sup orted by t 26, extending from t e frontupright framebars 1 1, as indicated.

. As thus constructed the display sections or signs, being hinged orivoted to the chains,`are liab e to swing slig tly when moving quicklyover the sprockets, and to prevent them from .swin ing into each otherand catching when trave ing over the sprockets it is necessary to havesome sort of partitions between them as they pass each other, and Weprefer to accomplish this with the bars28 which are rigidly secured tothe horizontal frames 3 and 6 and are bent, as shown, so as toextendbetween the folds of display sections or signs formed in travelingaround Power is applied to the sign-carrier as thus describedfrom a main'shaft 31, extending between and turning in suitable bearings se-` curedto the horizontal bars of the frame 8 8. by means of the chains 29 29,which run over the s rockets 10 10 on the shaft 9 and the sproc ets 3()30, secured to the-said shaft 31, and around this main shaft 3ltisassembled the operating mechanism. Power is secured from an electricmotor 32, Whichmay be of any -suitable construction, secured to' thebase 4. To the driving-shaft of the said motor is secured a worm-gear33, which meshes into the gear 34, secured to a shaft 35, which issupported Vby and turns'in suitable bearings in the standards 36 and 37,resting on the base 4.

When the machine is in operation, the motor is constantly running, andconse uently the shaft 35 is constantl turning, andl power isintermittently applic from the shaft 35 to the main shaft 31 by meansvof an electric clutch consisting of a magnet-coil contained in asuitable frame 38, two brass rings y39 and 40, connected each with anend of said coil and fastened on an insulatin -cylinder 41,. saidmagnet-coil and insulatmg-cylinder being rigidly secured to theconstantly-turning e brackets.

net-coil is inert.

be readily seen that the shaft 35 and magnetcoil 38 may revolvecontinuously; but the armature 44 will revolve only when the magnet-coilis energized. To this armature 44 is fastened the sprocket 45, over`which runs the chain 47 to the sprocket 46 on the main shaft 31, so thatitis apparent that the main shaft 31 turns, and through it thesign-carrier is caused to travel only when the magnet-coil of the clutchis energlzed.

The movement of the carrier is arrested and the sign being shown held indisplay position by means of a magnetic brake operating on the mainshaft 31, as shown in detail 1n Figs. 1, 2, and 6. A magnet-coil 48,,contained in a suitable yoke or frame 49, iwhich rests on a suitabletable or base 50,

elevated from the base 4, has a plunger 51 slidin within said coil,which lunger 1s connecte lby the rod 52 with the ever 53, which leverlhas the roller 54 at the top and is secured at the bottom to the shaft55, which is Vsupported by and turns in the bracket 56, resting on thetable 50. The main shaft 31 has secured to it the indented brake-wheel57, into the indentations of Which'iits the roller 54 on the lever 53.It is preferable to have a standard or support 58 restin on the table50, suitably journaled around tie main shaft 31 for the purpose ofgiving said shaft stability, and secured to this standard is the bracket59, extending between which and the plunger 51 is a spiral s ring 60,which vpulls the plunger out, and t us releases the ever holding thebrake-Wheel when the mag- This spring preferably has at one end athreaded -nut and screw 61 to adjust the tension of the s ring. It isthus readily seen that when t e magnet-coil is energized the plunger isdrawn 1n, and the lever is conse uently pulled against the brake-Wheel,ho ding the main shaft 31 stationary, and through it the sign-carrier,and when the magnet is inert the spring releases the lever from thebrake-wheel and allows the said shaft to turn, and through it thesigncarrier to travel.

The action of the magnetic clutch and the magnetic brake is controlledin this machine as we have constructed it bya combination of fourautomatic switches or "controllers To the shaft 35 of the magneticclutch, which is constantly turnin when the machine is in operation, issecure the sprocket 62, Fig. 4, over which runs the chain 63 to and overa sprocket 64, Fig. 2, secured to a shaft 65, which is supported andturns in suitable bearings in a frame 66. Secured to this shaft Aandturning with it is a small gear 67, which meshes into a large gear 68,attached to a shaft 69, turning in suitable bearings in the frame 66. Tothis shaft a cylinder 70, of any suitable non-conducting material, isattached. This cylinder has in its outer surface an offset or recess 71,and excepting the IOO 3S cuit through thelmagnetic clutch iscompletedand ymateria i which are inserted the `'magnetic-'brakel coillcircuit, are mounted `on anf'insulating-A surface ofthe said offset'orrecess the rest of the surface of the cylinder. is eoveredwith "asheeting of suitable' electrically-'conducting LTwo spring-brushes 72and 73,

blo'ck 74- in' such manner as 4'to make contin- 'uous' rubb" lcontactWiththe said cylinder .70..."Itfwi1l` e apparent thatasthe c linder Orotates thecircult will be continuous t ough the brushes 72 and 73 andthe conductive sheeting off the cylinder, but that when the fof the'plun erfof t 29.

brushesv `make Contact with' the vuncovered .offset orfrecess inthecylinder the circuit will j be broken.

The. circuit'through'the clutch-coil is completed, thus startingl thecarrier-to travel, by

means of a' switch operated by the' movement 4e ma' etic'brake in re'leasing the 1 rake-lever. o the end vof the plungerl within the coil issecured a rod 7.5, extending throu h the rear o f thelyoke of themagnetcoil,.an this rodycarriesa cross-bar o coil circuit, being suitablinsulatedfand"sup-v` 76, which is vadjlpstable onsaid rod bymeans ofnuts on'eit erf side thereof. A pair. of 'postsI 77.and v'78 areinserted in the clutchported on 'the table or` ase 50` and soarran'ed'that 4the cross-bar 76 `will connect veac with the other whenthe lun er 51-is pulled out by the spring 60," y g usl `1t will bereadilyseen that when the circuit through the magnetic-brake coil isbroken the lever' 4holding the-main shaft 31 stationary -is released,-`and. by the 'saine movement thecir-- the said main shaft started torotate:

.A- pair of posts vv79 and l8O are .insertediin" the lighting-circuit,ybein suitably insulated and sup "orted on the tab e or base 50 and soarrange` that the cross-bar 76 will connect each -with the other whenthe plunger 1 is' drawn in by the energizingl of the magnet coil, thuscompleting the lighting-circuit when the carrier is at irest, and ofcourse the said circuit would-'be broken when the plunger vis ulled outby the'spring.

, -t will be eeenthat the circuit through the brake-coil .will be brokenbut momentarily and closed again bythe continuous turning of'the`recessed cylinder 70, andv to keep this circuit broken until thesign-carrier shall have traveled Iinto roper position vwe haveconstructed"the-switch shown' in detail .in

Fig. 5', which is operated by the. combined movement-sv ofthe-brake-lever andl the main shaft- To thelever-shaft 55, Fig. 2,7is se-yvvcured the bent arm 81, which Itakes the two 'positions'.shown with themovement of thee,Verf`53," .To-the'base 4 is secured a supporti'ingfboard82,'to which "are secured two. tervmir'ialsor contaetf lates 83and 84, which are inserted the' rake coil circuit. v. The switch-arm 85,secured to a shaft 386, Fig. 1,

,I material. mounted on the board 82 flush withthe con- '100,l securedto" tlie A' ssaber;

supported inthe board 82, carriestwo contact-.buttons 87 and 88, whichwe prefer 'to mount on small pins extending 'through the switch-arm 85and having v'small spiral f l sj rings 89 and 9() to hold thebuttonsagainst t e contact-plates, the ends of said pins beinglconnected by any suitable conductive #attached vto the "switcharm, iandy 'thereby oi'penv the switch, wliiehwillremain open un-4 t the arm95, revolving`witli the mainl shaft, catches the saidswitch-almlever.'93and closes the switch.

AAs thus constructed the machine veould be j l operated with theswitches or controllers'lal readl described; but it would require veryAcare 1 adjustment of the switch operated by the brake-lever and mainshaft to cause the brake to arrest the carriers-at just the rightmoment, and we prefer to rovide a sup le- -mentary switch' 'or controler to Aaccom ish this purpose.l whichswitchis vassem led 'aroundand'operated by the main shaft.- To

the main shaft 31 a fiber o -'lin'der 96 is se.;

'cured by a screw 97., which a lows'4 it to be ad"-V 4 looA justed toany vposition on the'shaft. This cylinder has a recess `98 in 'itssurface and has securedto itat the edge of 4said recessa con-v.

ductive plate 99. Su' ported on a bracket ame of lthe sign,jas

shown,fand insulatedtherefrornfand from each other by a fiber plate"101, are-two spring-brushes 102'and 103, which makefeeh tlnuous contactwith the cylinderon' the main shaft and are 4inserted in the`brake=coilcircuit. It will thus be seen that as thev main shaft 31 rotates thebrake-coil circuit. will becompletedfonlf when these brushes are inContact with. t e conductive plate' 99' on the fiber cylinder 96, andby'ad'ustingthe posi!- tion of saidcylinder on the s a'ft by rneans ofthe screw 97 vthe brake-coil circuity can'be" made toclose at thedesiredfr'noment.

The wiring shownin Fig. 8. f

When the sign is inoperat-ion, the' motorie ofcourse constant] ductivesheeted cylinder 70 is likewise conrro .lab

running, andthe constantly' turning. When the said cylinder rev volvesso as to breakthe brake-coil'circuit between the brushes'72and"73,-tl1eplunger of the brake is pulled out by the spring-'at'-tached to it,.thus releasing the lever romfthe brake-wheel, and by thisoney movement the.

clutch-coil circuit is completed between the and throng brake-coilcircuit between the brushes 102- and.l.03. The .constantly-turningcylinder closes the brake-coil circuit between the brushes 72 and'f'shortly after it breaks it; but the circuit remains open between theconl y -tact-plates 83 and 84 until the rejecting arm, revolving withthe main shat, catches the switch-arm lever and closes the switch. Thecircuit remains broken. between the brushes IGZ and lO until the mainshaft turns sufficiently to vbring the conductive plate on the fibercylinder turning with the main shaft in contact With said brushes, whenthe circuit is completed through the brakecoil and the plunger of thebrake is drawn in, thus arresting the main shaft by'means of thebrake-Wheel and lever. The movement of the plunger breaks theclutch-coil circuit between the posts 77 and 78 and completes thelighting-circuit. between the posts 79 and 80., T he. magnetic brakeholds the main shaft,- .and through it the sign-carrier, stationaryuntil the brake-coil circuit is broken again by the constantly-turningcylinder, when the same operation is re cated.

, Having thusjfully describe the construction and operation of ourinvention, what we claimas new,l and desire to protect by LettersPatent, is-

1. Ina changeable sign, the combination of a pair of endless chains,display sections or signssnspended between-.said chains, andl means forcontaining numerous display sections or signs in ysmall space,comprising series of pairs of sprockets overwhich the said endlesschains run, and `partitions extending` between the folds of displaysections or signs, for preventing the display sections or signs frominterfering with each other; substantially as described.

2.. In a changeable sign, the combination of a pair of endless chains,display sections or signs, cylinders or sockets secured to the top ofthe said display sections or signs, pins or pivots secured to theendless chains and fitting into the said cylinders or sockets on thedisplay sections or signs, and means for containing numerous displaysections or signs ,in small space, com risin two series of pairs ofsprockets .over w ich t e said endless chains run alternately from oneseries to the other, andy artitions extending between the folds of dispay sections or signs thus formed, for preventing the display sections orsigns from interfering with each other substantially as described. l n

V3. In a changeable sign, a sign-carrier, a

ssaees main shaft in driving connection therewith7 a constantly-rotatingshaft, a magnet-coil secured to and turning with said constantlyrotatingshaft, means for ener izing said magnet-coil, comprising insulate ringsconnected with the ends of said coil and turning with it and brushessuitably sus ended to make contact with said rings, an an armaturemounted to revolve independently of the constantly-rotating shaft, indriving connection with the main shaft; substantially as describedt 4.-.lIn achangeable sign, a sign-carrier, a main shaft in drivin connectiontherewith, an indented brake-W reel secured to the said. shaft, a leverlittin into the indentaticns of the saidbrake-Whee a magnet-coil, aplunger slidin Within the said magnet-coil and. connecte With the saidlever, and a spring to pull out the plun er and release the lever;substantially as ascribed.

5. In a changeable sign, a sign-carrier, a main shaft indrivingconnection therewith, a -constantly-rotating.shaft, a magnetic-clutchmechanism for transmitting intermittent motion from theconstantly-rotating shaft to the main shaft, a magnetic-brake mechanismfor arresting the movement of the main shaft, a magnetic-clutch circuit,a pair of contactpsts inserted in the said circuit, and a movableconnecting-bar operated by the movement of the magnetic brake;substantially as described.

6. In a` changeable sign, a sign-carrier, a main shaft in drlvingconnection therewith, a constantly-rotating shaft, meansforintermittently imparting motion from the constantly-rotating shafttothe main shaft including a constantly-turnin magnet-coil and anindependently-mounte armature, and

means for arresting the motion of the main shaft including a magnet-coiland plunger sliding therein; substantially as described.

7. In a changeable sign, a sign-carrier, a main shaft in drivingconnection therewith, means. for arresting the movement of the mainshaft including a magnet-coil, a lunger sliding therein, and an electriccircuit t rrou h the magnet-coil, and means for breaking t 1e circuitthrough the said magnet-coil, comprising a constantly-rotating cylinder,said `cylinder'having a portion of its surface electrically conductiveand a portion non-conductive, and a pair of brushes inserted in themagnet-coil circuit and suspended to make continuous contact with thesurface of the said cylinder as it rotates substantially as described.

8. In a changeable sign, a sign-carrier, a main shaft in drivingconnection therewith, a constantly-rotating shaft, a magnetic-- clutchmechanism foiuimparting intermittent motion from the constantly-rotatingshaft to the main shaft, including a magnet-rollend an armaturemountcd'to revolve indepcwl- IOO IIO

. the rear end ofthe coil, and an electric circuit .'stantly-rotating saft, said cylinderhaving' 5 rmove Itjhe's'v'vitcharm lever forclosingthe f mainshaft in driving connection therewith, a

c'onstantly-rotatin l fing the motionl of t e main shaft, including a lmagnet-coil, a plunger sliding therein, a lever 1vconneetedi with-theplunger and an electric v 'circuit3 throughfthe magnet-coiLand means 6o"the magnet-coil, .comprising a' cylinder 1n "'drivingcennection withthe constantly-ro` "Ftat'igshaft, said cylinder having a lon it'udi-``nal ``section ofl its periphery -non-con uctive ltrolling lthe clutchand` brake, comprising a l a'longitudinal section ofsaid surfacenon-cony g l ductive or insulated, and apair of brushes in- `nect anddisconnect the said posts with each other with the movement yof theAbrakelmain shaft in driving connection therewith,

4the switch,.and a projecting arm secured to 1 magnetic brake forarresting the' motion of plunger sliding thereln, aspring orcounteracting'the forcegof the ma net, a lever connect'ed with theplungeran a tocthed'brake# i wheel secured to themainshaft, and an autosserted inthe brake-coil circuit, a lever atv tached; to theswitch-arm,a,projecting arm attached to the brake-lever t'o' move theswitch-arm lever for opening the switch, andently of eachother, and anelectric circuit through the magnet-coil, a ymagnetic brakel 'forarresting the motion of the main shaft,

including a magnet-coil, a plungerv sliding therein, a rod attached tothe end of the plunger Within the coil and'extending through through themagnet-coil, and means for concylinder'in drivin connectionwith the con#its surface electrically :conductive and having serted inthe ,brake-coilcircuit suspended to make continuous contact with the surface of thelcylinder, a pair of posts inserted in the clutch-coil circuit,andaconnecting-bar on the rod-securedto the brake-plunger to`conplunger; substantially as described.

9. In a lchangeable sign, a' sign-.carrier,.a

the main shaft, comprising `.ama et-coil, a

matic switch, comprising contact-,plates ina projecting arm secured tothe main shaft/to switch; substantiall asdescribed.v l

' 11.*' In a changea le sign, a sign-carrier, a

shaft, means for arrestfor opening and closing'the circuit throughY andthe balance conductive, a pair of brushes inserted in the magnetcoilcircuit and ar-H ranged to makecontinuous rubbing contact with the saidcylinder, and an automatic switch consisting of al pair ofcontact-plates inserted-in the magnet-coil circuit, a switcharmgarrangedto connect and disconnect the .contactfplates by its movement, aprojecting arm 'attached to the brake-lever for moving the switch-armtodisconnect the contact-v plates, and a-projecting arm secured to the`Imain shaft for moving the switch-arm tc connect the contact-plates;substantiallyi as de# scribed. l

`12, lIn a changeable sign, a sign-carrier, a

main shaft in driving connection therewith, a

constantly-rotating shaft, a magnetic clutch for intermittentlytransmitting power from the constantly-rotating shaft to the main shaft,including a imagnet-coil and an `armature mounted to revolveindependently .of-

each other andan electric circuit through the 4 magnet-coil, a magneticbrakey for4 .arresting the movement of t e main shaft, including a manet-coil,l a plun er sliding therein, a

bra e-lever connecte with the plunger and an electric circuit throughthe magnet-coil, a

circuit-breaker for the brake-magnet-coil circuit, consisting of acylinder in driving con# nection with the constantly-rotating shaft,said cylinder having a longitudinal section'o its peripherynon-conductive and the balance conductive, anda pair of brushes insertedin the brake-magnet-coil circuit and arranged to make continuous rubbingcontact with the p peripheryof the cylinder, a switch foropeningandclosingthe circuit through the clutchlmagnet coil,"comprisinga pair of posts inserted in the said circuit, a rod secured to the innerend ofthe magneticsbrake plunger and i extending through therear end ofthe magnet-coil, an' adjustable cross-bar secured to the said rod andarran ed to connect and disl connect the osts wit each other with themovement o the plunger, and a switch for opening and closing thebrake-coil circuit,

I'Io

comprising an arm attached to the vbrake-` lever, an arm secured to andturning 4with the main shaft, a 'lever in thev path of both the "saidarms, asWitch-arm secured to and moving with'this lever, and twocontact-plates vinserted in the brake-coil-circuit, arranged so that themovement ofthe switch-arm willA connect and disconnect them;substantially asdescribed.y l

. 1-3. In a chan eablesign, a sign-carrier, a mainshaft inl drivingconnection therewith, means for arrestingthe movement `ofr theI mainshaft, including ama net-coih'aplun-A ger and anelectric circuit t roughthe'magnet-coil, and a switch or controller for openin and closing the saidcircuit, com prisinga cy inder. of` suitable non-conducting substancearranged to 'turn freely on the ,main shaft, a screw for holding thecylinder fastto the shaft in any position, a strip of suitableconductive substance secured tothe surface of the cylinderlongitudinally, and apair of brushes inserted in the magnet-coil circuitand arranged to make continuous contact with the surface of the cylinderas it rotates with the main shaft; substantially as described. c

.14.- In a changeable sign, a sign-carrier, a main shaft in drivingconnection therewith, a ro constantly-rotating shaft, a magnetic brakeoperating on the main shaft, including a magnet-coil, a plunger and acircuit through the magnet-coi and means for opening and closing thesaid circuit, comprising a cylinder I in drivin connection with theconstantlyrotating s aft, said cylinder having a longitudinal section ofits surface non-conductive and the balance conductive, a pair of brushesinserted in the magnet-coil circuit and arranged to make continuouscontact with the cylinder, a cylinder of` suitable non-conductivesubstance secured to and adjustable on the main shaft, a strip ofsuitable conductive substance secured on the .surface of the s aidcylinder longitudinally, and a pair of brushes inserted in themagnet-coil circuit and arranged to make continuous contact with thesaid cylinder; substantially as described.

15'. In a changeable sign, a sign-carrier, a main shaft in drivingconnection therewith, a contsantly-rotatin shaft, a' magnetic-clutchmechanism, inclu ing a magnet-coil and an armature mounted to revolveindependently of each other, and an electric circuit through themagnet-coil, a magnetic-brake mechanism, including a magnet-coil, aplunger sliding therein and an electric circuit throu h the magnet-coil,-means for opening and kc osing the clutch-coil circuit, comprising apair of contact-posts inserted in the clutch-coil circuit, a rod securedto the inner end of the brake-plunger and extending through the rear ofthe magnet-coil, and a connecting-bar adjustably secured to the said rodand arranged to connect and disconnect the said posts with each other,and means for opening and closing the brake-coil circuit, comprising acylinder in driving connection with the constantly-rotating shaft, saidcylinder having a longitudinal section of its surface non-conductive andthe balance conduct've, a pair of brushes inserted in the-brake-coicircuit and arranged to make continuous contact with the cylinder, acylinder of suitable non-conductive substance secured to and adjustableon the main shaft, a strip of suitable conductive substance secured onthe surface of the Vsaid cylinder longitudinally, and a pair of brushesinserted in the brake-coil circuit and arran ed to make continuouscontact with the said cylinder; substantially as described. 16. In achangeable sign, a sign-carrier, a

f main shaft in driving connection therewith,

a constantly-rotating shaft, a magneticclutch mechanism, including amagnet-coil 'coil circuit', a rod secured to the inner end of thebrake-plunger and extending through the rear of the magnet-coil, and aconnecting-bar adjustably secured to the said rod and arranged toconnect and disconnect the said contact-posts with each other, and meansfor opening and closing the brake-coil circuit, comprising a cylinder indriving connection with the constantly-rotating shaft, said cylinderhaving a longitudinal section of its surface non-conductive and thebalance conductive, a pair of brushes inserted in the brakecoil circuitand arranged to make continuous contact with the cylinder, a pair ofcontactplates inserted in the brake-coil circuit, a switch-arm arrangedto`connect and disconnect these contactlates with its movement, an armoperated y the brake-plunger t0 cause the switch-arm to disconnect thecontact-plates, an arm secured to and turning with the main shaft tocause the switch-arm to connect the contact-plates, a cylinder ofsuitable non-conductive substance secured to and adjustable on the mainshaft, a strip of suitable conductive substance secured to the surfaceof this cylinder longitudinally, and a pair of brushes inserted in thebrake-coil circuit and arranged to make continuous contact with the saidcylinder; substantially as described 17. In a changeable sign, asign-carrier, a main shaft in driving connection therewith, aconstantly-rotating shaft', a magnetic-clutch mechanism, including amagnet-coil and an armature mounted to revolve independentl of eachother, and an electric circuit throug i the magnet-coil, amagnetic-brake mechanism, including a magnet-coil, a plunger slidingtherein and an electric circuit through the magnet-coil, means foropening and closing the clutch-coil circuit, comprising a pair ofcontact-posts inserted in the clutch-coil IIS circuit, a rod secured tothe inner end of the brake-plunger and extending through the rear of themagnet-coil, and a connecting-bar adjustably secured to the said rod andarranged to connect and disconnect the said 120 contact-posts with eachother, an electriclighting circuit, a pair of contact-posts inserted inthe said circuit and arranged so that the aforesaid connecting-bar willconnect and disconnect them, means for opening and clos- 1 25 ing .thebrake-coil circuit, including a constantly-turning cylinder, a pair ofbrushes in constant contact therewith, a pair of contactplates, amovable switch-arm to connect and disconnect them, a projecting armoperated 13G' IIO Aarm, a,cy1inder secured to and ad'ustable on the mainshaft, and a air of brus es in constant contact thereWit substantiallyas det scribed.

' 18. 'In a changeable sign, a sign-carrier, a main` shaft in drivingconnection therewith, a constantly-rotating shaft, l a magnetic-clutchmechanism vfor transmitting intermittent motion from theconstantly-rotating shaft lto the main `shaft, a magneticbrake mechanismfor arresting the movement of the main shaft,`magneticc1utch circuit, aypair of contact-posts insertedin the said circuit, a lighting-circuit,a pair of contactosts inserted in the said circuit, a connecting ar oerated. by

the movement of the magnetic braI e, a magmetio-brake circuit, aperiodic circuit-breaker for the said circuit, a' switch inserted in thesame circuit and orlierated by the movement of the magnetic bra e and'the main shaft, and

a regulatlng-switch inserted in the same cir.

cuit and constructed on and operated b the turning of the main shaft;substantial y as described'. l

`In testimony whereof We have hereunto set our hands, in the presence oftwosubscribing Witnesses, this 21st day of'Novem` ber, 1905.

THOMAS W. THOMAS. i GEORGE W. GlLLETTE.

Witnesses WM. H. CHAPMAN, lS. E. KRAMER.

